During a Local Authority planning permission process for a new residential development, it’s common for your Local Authority to request a Noise Impact Assessment or a Noise Survey, especially if your proposed dwelling is situated near a noise source such as a busy road, railway line, industrial premises, or entertainment venue. These assessments are typically conducted under the guidance of British Standard 8233:2014: Sound insulation and noise reduction for buildings and the Professional Planning Guidance (ProPG) 2017.
The recently published Acoustics Ventilation and Overheating (AVO) Residential Design Guide recommends an approach for achieving good acoustic design, as described in the ProPG. The AVO guide provides detailed information regarding the impact of noise ingress, particularly under overheating conditions.
For planning purposes, road traffic and rail noise play a crucial role in ensuring that internal noise levels in new build developments remain acceptable. We adhere to recognized standards such as the Calculation of Road Traffic Noise (CRTN) and the Department of Transport Technical Memorandum Calculation of Rail Noise, 1995 (CRN). The noise monitoring procedure outlined in CRTN requires that road traffic noise is monitored continuously for three hours on a normal weekday between 10:00 hours and 17:00 hours, at a location at least 3.5 meters from the nearest kerbside. The 3-hour road traffic noise level measured can then be converted to an 18-hour level.
The objective of a noise assessment is to quantify the baseline noise environment at the proposed site and its surroundings. The potential noise impact on future occupants of the residential dwelling will be evaluated. It is essential to control noise levels to an acceptable standard both internally and externally, to ensure comfortable living and sleeping conditions.
The process of undertaking a planning application noise assessment generally includes:
1. Measuring the existing noise environment at and around the proposed development.
2. Calculating internal noise levels of dwellings within the development.
3. Comparing the calculated internal noise level with Local Planning Policy to assess compliance.
4. If needed, providing Mitigation Advice to demonstrate that Local Planning Policy can be met.
To meet guideline noise levels, and if necessary, we can determine the appropriate Acoustic Solutions, including double glazing and ventilation specifications, based on the results of the noise survey.